Renesas SH7641 Manuel D’Utilisation

Section 18   Multi-Function Timer Pulse Unit (MTU) 

Rev. 4.00  Sep. 14, 2005  Page 572 of 982 

REJ09B0023-0400 

 

•  When TGR is an input capture register 

When input capture occurs, the value in TCNT is transferred to TGR and the value previously 
held in the timer general register is transferred to the buffer register. 

This operation is illustrated in figure 18.14. 

Buffer

register

Timer general

register

TCNT

Input capture
signal

 

Example of Buffer Operation Setting Procedure: Figure 18.15 shows an example of the buffer 
operation setting procedure. 

Buffer operation

Select TGR function

Set buffer operation

Start count

<Buffer operation>

[1]

[2]

[3]

[1]  Designate TGR as an input capture register or output 

compare register by means of TIOR.

[2]  Designate TGR for buffer operation with bits BFA and 

BFB in TMDR.

[3]  Set the CST bit in TSTR to 1 start the count 

operation.